OpenTTD, the free and open source game that's a reimplementation and much enhanced version of Transport Tycoon Deluxe has a big new Beta up with some huge changes. Ahead of their plans to release on Steam on April 1, they're making some sweeping changes to the underlying code to make it run as great as possible across all systems.
With OpenTTD 1.11.0-beta2 they've massively improved their rendering work with OpenGL support now merged in. They said it's such a big improvement they had to add a setting to limit the maximum fast-forward speed due to it. The display will now run at 60FPS and there's also now generic Linux builds in addition to per-distro packages making it easier than ever to try out OpenTTD.
Overall the 1.11 is shaping up to be huge and not just because of all the main rendering improvements, there's quite a lot of smaller new features and bug fixes too. Features including the refresh rate being configurable, automatic UI and font zoom levels if supported by the OS, towns can build tunnels now, allow planting 'clumps' of trees by dragging in the scenario editor, rendering of large viewports was improved, support for Emscripten to play in the browser, the ability to drag and drop vehicles in group GUI for shared order groups and much more.
A great example of what a group of dedicated fans can do to keep a game very much alive. There's really no need on any platform to play the original with OpenTTD being around.
See the announcement here.